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18-May-2016 20:26

Accuracy Checks of Biodiesel Blends Analyses of more than 20 biodiesel blends revealed that inaccurate blending happens frequently.ASTM D6866 is the standard test method developed by ASTM International (formerly the American Society for Testing and Materials) to determine the biobased carbon/biogenic carbon content of solid, liquid, and gaseous samples using radiocarbon analysis.Accelerator mass spectrometry measures the amount of carbon-14, or radiocarbon, present in a sample, which can be used to calculate its age.Around the world, only about 100 facilities house this equipment.SCAR offers significant time and cost savings compared to the standard approach for carbon dating and could be useful for a host of other applications such as measuring emissions from fossil fuels or certifying the amount of biogenic content in biofuels.Faster, cheaper carbon dating Current carbon dating processes require researchers to send a sample to a large facility with an accelerator mass spectrometer and then wait several weeks to get results back.

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ASTM D6866-16 is the current active version of the standard as of June 2016.Read More Please be informed that the Miami lab will be closed during these periods (all dates inclusive): May 29 (Memorial Day) July 4 (Independence Day) September 4 (Labor Day) November 23-24 (Thanksgiving Holiday) December 22, 25, 26 (Christmas Holiday) January 1, 2018 (New Year’s Day) About Beta Analytic Beta Analytic is an accredited ISO/IEC 17005 radiocarbon […] As part of the continuous efforts to enhance the laboratory’s value-added services, Beta Analytic now provides C: N, %C and %N measurements on collagen extracted from non-cremated bones in addition to δ15N and δ13C at no additional cost for samples sent for radiocarbon dating.The need to distinguish between the biogenic and fossil-based fractions of carbon dioxide emissions became apparent at the onset of CO2 emission trading not only in Europe but also in North America and other parts of the world."Accelerator mass spectroscopy can be used to carbon date bones, wood, fabrics or anything of biological origin, pinpointing its age of up to 50,000 years ago," said Iacopo Galli, a member of the research team.

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"Using our new technique, we can do something similar but with a lower cost and with a faster delivery time for the results." The researchers report that their SCAR instrument can detect radiocarbon dioxide concentration with a precision of 0.4 percent, which approaches the 0.2 percent precision of the best accelerator mass spectrometers.According to Reddy, the radiocarbon-based biodiesel blend determination poses some important advantages over existing methods, including the European Standard method EN 14078, which employs infrared spectroscopy. Their study demonstrated ±1% accuracy over the entire v/v blending range (0–100%) while accounting for real-world variability in all of the input parameters.

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